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AD53509_15

更新时间： 2024-11-25 01:11:11
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亚德诺 - ADI /
页数 文件大小 规格书
12页 352K
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High Performance Driver/Comparator

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AD53509_15 数据手册

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High Performance Driver/Comparator,  
Active Load on a Single Chip  
AD53509  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
250 MHz operation  
V
V
V
V
V
V
V
V
CC  
34  
CC  
CC  
51  
CC  
52  
EE  
39  
EE  
40  
EE EE  
41 32  
Driver/comparator and active load included  
On-chip Schottky diode bridge  
52-lead LQFP_EP package  
39nF  
CHDCPL  
V
47  
45  
H
AD53509  
V
T
DATA 37  
VHDCPL  
38  
43  
42  
DATA  
IOD  
39nF  
CLDCPL  
46Ω  
APPLICATIONS  
DRIVER  
V
OUT  
IOD  
VLDCPL  
RLD 49  
Automatic test equipment (ATE)  
Semiconductor test systems  
Board test systems  
50  
RLD  
31  
V
L
HCOMP  
LEH  
Instrumentation and characterization equipment  
LEH  
QH  
GENERAL DESCRIPTION  
QH  
The AD53509 is a single chip that performs the pin electronics  
functions of driver, comparator, and active load in ATE VLSI  
and memory testers. In addition, a Schottky diode bridge for  
the active load and a VCOM buffer are included internally.  
COMPARATOR  
QL  
QL  
LEL  
LEL  
LCOMP  
The driver is a proprietary design that features three active  
states: data high mode, data low mode, and term mode as well  
as an inhibit state. The output voltage range is −2 V to +7 V to  
accommodate a wide variety of test devices. The output leakage  
is typically <250 nA over the signal range.  
ACTIVE LOAD  
VCOMI  
IOLC  
+1  
VCOMS  
V/I  
IOLRTN  
OUT_L  
THERM  
IOHRTN  
The dual comparator, with an input range equal to the driver  
output range, features built-in latches and ECL-compatible  
outputs. The outputs are capable of driving 50 Ω signal lines  
terminated to −2 V. Signal tracking capability is >5 V/ns.  
INHL 36  
35  
INHL  
1.0µA/K  
14 NC  
26 NC  
IOHC  
V/I  
The active load can be set up to 40 mA load current with less  
than a 10 μA linearity error through the set range. IOH, IOL, and  
the buffered VCOM are independently adjustable. On-board  
Schottky diodes provide high speed switching and low  
capacitance.  
9
33 44 46 48  
PWRGND  
2
5
8
HQGND2  
HQGND  
VCCO  
NC = NO CONNECT  
Figure 1.  
Also included on the chip is an on-board temperature sensor  
whose purpose is to give an indication of the surface temperature  
of the DCL. This information can be used to measure θJC and θJA  
or flag an alarm if proper cooling is lost. Output from the sensor  
is a current sink that is proportional to absolute temperature.  
The gain is trimmed to a nominal value of 1.0 μA/K. For example,  
the output current can be sensed by using a 10 kꢀ resistor  
connected from 10 V to the THERM pin. A voltage drop across  
the resistor then develops that equals  
10 K × 1 μA/K = 10 mV/K = 2.98 V (at room temperature)  
Rev. B  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2008 Analog Devices, Inc. All rights reserved.  
 
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